How do I see what bandwidth gets used for kernels in a density plot and how do I specify a bandwidth to be used? I tried
如何在密度图中看到内核使用的带宽以及如何指定要使用的带宽?我试着
ggplot(mtcars,aes(mpg))+geom_density(bw=1)
with no luck.
没有运气。
1 个解决方案
#1
8
stat_geom utilises the adjust argument to apply a multiplier to the optimal bandwidth that ggplot calculates see documentation for density(). Try:
stat_geom使用调整参数将乘数应用到最优带宽上，ggplot计算参见密度()文档。试一试:
ggplot(mtcars,aes(mpg))+geom_density() + stat_density(adjust = 2)
ggplot(mtcars,aes(mpg))+geom_density() + stat_density(adjustment = 2)
I gather to determine the calculated optimal bandwidth - based on "the standard deviation of the smoothing kernel" - you'll need to interrogate Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. New York: Springer.
我收集以确定计算的最优带宽——基于“平滑核的标准偏差”——您将需要查询Venables, W. N.和Ripley, B. D.(2002)现代应用统计与纽约:施普林格。
#1
8
stat_geom utilises the adjust argument to apply a multiplier to the optimal bandwidth that ggplot calculates see documentation for density(). Try:
stat_geom使用调整参数将乘数应用到最优带宽上，ggplot计算参见密度()文档。试一试:
ggplot(mtcars,aes(mpg))+geom_density() + stat_density(adjust = 2)
ggplot(mtcars,aes(mpg))+geom_density() + stat_density(adjustment = 2)
I gather to determine the calculated optimal bandwidth - based on "the standard deviation of the smoothing kernel" - you'll need to interrogate Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. New York: Springer.
我收集以确定计算的最优带宽——基于“平滑核的标准偏差”——您将需要查询Venables, W. N.和Ripley, B. D.(2002)现代应用统计与纽约:施普林格。